Column Subtraction Mastery
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Column Subtraction Mastery
WALT: Subtract two- and three-digit numbers using column subtraction with regrouping.
🔥 Warm-Up: Quick Fire Facts
Solve these subtraction facts as fast as you can!
✏️ Guided Column Subtraction with Regrouping
Remember: If the top number is smaller, regroup (exchange) from the next column. Show ALL your working!
💡 Key words: regroup, exchange, hundreds, tens, ones
🎯 Estimation Challenge
First estimate your answer by rounding to the nearest 10. Then solve using column subtraction and check how close you were!
💡 Round each number to the nearest 10, then subtract to get your estimate.
My estimate (round to nearest 10): _____ − _____ = _____
My exact answer: _____ | Was my estimate close? Yes / No
My estimate (round to nearest 10): _____ − _____ = _____
My exact answer: _____ | Was my estimate close? Yes / No
My estimate: $_____ − $_____ ≈ $_____
Answer: Lena has $_____ left.
About This Worksheet
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Created with Kuraplan's AI, designed for real classroom use.
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